board/compulab/common/splash.c

   1 /*
   2  * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
   3  *
   4  * Authors: Igor Grinberg <grinberg@compulab.co.il>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <nand.h>
  11 #include <errno.h>
  12 #include <bmp_layout.h>
  13 #include "common.h"
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 #ifdef CONFIG_CMD_NAND
  18 static int splash_nand_read(u32 bmp_load_addr, int offset, size_t read_size)
  19 {
  20         return nand_read_skip_bad(&nand_info[nand_curr_device], offset,
  21                                   &read_size, NULL,
  22                                   nand_info[nand_curr_device].size,
  23                                   (u_char *)bmp_load_addr);
  24 }
  25 #else
  26 static int splash_nand_read(u32 bmp_load_addr, int offset, size_t read_size)
  27 {
  28         debug("%s: nand support not available\n", __func__);
  29         return -ENOSYS;
  30 }
  31 #endif
  32
  33 static int splash_storage_read(u32 bmp_load_addr, int offset, size_t read_size)
  34 {
  35         return splash_nand_read(bmp_load_addr, offset, read_size);
  36 }
  37
  38 static int splash_load_raw(u32 bmp_load_addr, int offset)
  39 {
  40         struct bmp_header *bmp_hdr;
  41         int res;
  42         size_t bmp_size, bmp_header_size = sizeof(struct bmp_header);
  43
  44         if (bmp_load_addr + bmp_header_size >= gd->start_addr_sp)
  45                 goto splash_address_too_high;
  46
  47         res = splash_storage_read(bmp_load_addr, offset, bmp_header_size);
  48         if (res < 0)
  49                 return res;
  50
  51         bmp_hdr = (struct bmp_header *)bmp_load_addr;
  52         bmp_size = le32_to_cpu(bmp_hdr->file_size);
  53
  54         if (bmp_load_addr + bmp_size >= gd->start_addr_sp)
  55                 goto splash_address_too_high;
  56
  57         return splash_storage_read(bmp_load_addr, offset, bmp_size);
  58
  59 splash_address_too_high:
  60         printf("Error: splashimage address too high. Data overwrites U-Boot "
  61                 "and/or placed beyond DRAM boundaries.\n");
  62
  63         return -EFAULT;
  64 }
  65
  66 int cl_splash_screen_prepare(int offset)
  67 {
  68         char *env_splashimage_value;
  69         u32 bmp_load_addr;
  70
  71         env_splashimage_value = getenv("splashimage");
  72         if (env_splashimage_value == NULL)
  73                 return -ENOENT;
  74
  75         bmp_load_addr = simple_strtoul(env_splashimage_value, 0, 16);
  76         if (bmp_load_addr == 0) {
  77                 printf("Error: bad splashimage address specified\n");
  78                 return -EFAULT;
  79         }
  80
  81         return splash_load_raw(bmp_load_addr, offset);
  82 }